A child's imaginary friend or the name of an Australian/French Canadian fetus.
Family Friend: "Is Gumnut here?"
Child: "No, Gumnut is sleeping."

-or-

Friend: "How's Gumnut?"
Mother-to-be: "Good... she kicked all night long though so I couldn't get any sleep."
by Rella April 17, 2008
When your nuts stick to your inner thigh
"Damn I got wicked gum nuts right now but my coworkers are looking I can't unstick it"
by genualdi December 19, 2014
Weirdo/Freak/Timewaster that posts fake adverts on Gumtree.com and then continues to waste responder's time.
This Gumnut corrseponded to me over a 5 day period and there never was a room for rent!
by Daveout Atheist January 13, 2007
A gumnut is a person who can be classed as a total geek or nerd or someone of lower social standards.
Shit did you see Daina's friends, what Gumnuts!
by Leigh Aiston July 19, 2006

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